Yamaha YZF-R1, Manual, Page: 33 / 82

– 30 –
13. High-lift Camshafts
Parts List
Possible to adjust the valve timing using the
long holes on the cam sprocket.
USE THESE OVAL HOLES FOR
TIMING ADJUSTMENT.
The set of the camshaft, valve spring, ECU
and air funnel must be used in the following
combination.
Use the Valve spring of the STD.
14. Cam Sprocket(B3L-12176-70)
No. PART No. PART NAME Q'TY REMARKS
1 B3L-12170-70 CAM SHAFT ASSY. 1 INT
2 B3L-12180-70 CAM SHAFT ASSY. 1 EXT
No. PART No. PART NAME Q'TY REMARKS
3 B3L-0012176-70 SPROCKET, CAM 1 INT/EXT-shared use
締付トルク24±2Nm
R1 EN2911 2019Rev